App Overview

Perspective Crop Lens icon

Perspective Crop Lens

Masanori Katsuta · Photo & Video

Even if you intend to take a photo from the front, the image can be distorted due to the angle of the device or the camera lens.

$1.99 · In-app purchases

PRICE
$1.99
In-app purchases
BUSINESS MODEL
Paid
No overall Grossing estimate available
RATING
5.0
1 ratings · Top 5%

Evidence scope: No current overall US chart position is available. Category-chart positions shown in discovery are a separate scope. Revenue is a directional model estimate, not verified earnings.

Build your own version

Build Kit

Make this idea yours

A product spec, screen plans, and build steps for your coding agent.

First kit free with a verified email

Add to a Remix

Combine features and design from your favorite apps.

Kit ready. Verify your email to download it.

What's included18 files

A product spec, phased build plan, differentiation notes, and screen references.

  • START_HERE
  • AGENTS
  • EVIDENCE
  • SPEC
  • BUILD_PLAN
  • DIFFERENTIATION
  • skills/
  • screens/
Preview a sample Build Kit No email needed

Illustrative example: an invoice app for independent contractors. Your kit is tailored to the app you choose; this is not its generated content.

Feature spec

Goal: Send a clear invoice after finishing a job.

  • Add a client, line items, a due date, and payment instructions.
  • Preview the total before exporting a PDF.
  • Keep an editable draft if export fails.

Screen plan

Invoice editor: Client at the top, editable line items in the middle, total and preview action at the bottom.

States: Empty draft, validation errors beside each field, exporting, and a retry action that preserves the draft.

Differentiate and validate

Hypothesis: Contractors need faster repeat invoices more than more templates.

First experiment: Test duplicating a previous job with five contractors. Watch where they hesitate before expanding the feature set.

The full kit adds a phased build plan, evidence notes, tool prompts, and implementation guidance. It is a plan for your coding agent, not a finished app.

Usage: Mechanics are fair game; never reuse the original name, branding, assets, or verbatim copy.

JavaScript is required to complete mailbox verification.

Free quick prompt For a smaller starting point

Quick prompt

> SELECT BUILD PLATFORM:

Good fit for mobile-first iOS and Android prototypes with managed app scaffolding.

// RORK SYSTEM PROMPT
Rork plan preview for Perspective Crop Lens: map the core Photo & Video workflow, choose the smallest differentiated feature set, define the data and monetization boundaries, then prototype the riskiest user journey first.
            

Preview ready. Verify your email to reveal and copy the full prompt.

JavaScript is required to complete mailbox verification. Return to this prompt preview.

Continue in Rork copies the full prompt to your clipboard first, then opens Rork in a new tab.

Continue in Rork >

Affiliate link: CloneChart may earn a commission at no extra cost

Opportunities

AI-GENERATED OPPORTUNITY HYPOTHESES

These are generated suggestions, not verified review quotations. Check current App Store reviews and speak with users before treating a possible gap as a requirement.

Hypothesis 1

Include more filters and editing options.

Assumption to check: Limited editing features compared to competitors

Validate with people who use this workflow before building.

Hypothesis 2

Add batch editing for multiple images.

Assumption to check: No batch editing capabilities

Validate with people who use this workflow before building.

Hypothesis 3

Implement cloud backup for user images.

Assumption to check: Lack of cloud storage for edits

Validate with people who use this workflow before building.

Hypothesis 4

Provide onboarding tutorials for new users.

Assumption to check: No user tutorials or guides

Validate with people who use this workflow before building.

App evidence

Original App Store material. Ratings and screenshots describe the existing app, not proof of demand for your version.

App Store description

Even if you intend to take a photo from the front, the image can be distorted due to the angle of the device or the camera lens. TV screens, exhibits, whiteboards, signboards, posters, documents, photos, blackboards, paintings, calligraphy works, timetables, smartphone screens, etc. Also, there are many cases where it is not possible to take pictures from directly in front due to physical constraints. From such perspective-distorted photos, you can quickly cut out only the necessary parts at right angles. Cuts out a free-form rectangle from a photo and generates a new rectangular image with right angles. The “Cropped Image View” allows you to enjoy working while seeing the results in real time. Moreover··· Conversely, you can also add a perspective effect to a monotonous photo. [Features] ・“Cropped Image View” that can be checked in real time ・Use the "Magnifying Glass" to fine-tune crop marks as you wish ・ Intuitive pinch operation for adjusting the aspect ratio ・Horizontal/vertical alignment between cutout marks is also informed by color. [Photo Source] ・Start the camera and take a photo ・Select photo from photo album ・Import shared files from other apps ・Paste photos copied from web images, etc. [Outputs] ・Image file storage: Photo album (camera roll) ・Image file sharing: AirDrop, LINE, Facebook, Dropbox, Instagram,...

Written user reviews are not shown here. Check current App Store reviews >

Screenshots

< Scroll to see more >

Build scope

Plan a focused first version with your coding agent. These are planning assumptions, not a delivery guarantee.

Define the first version

Choose one audience and one core workflow. Use the kit to agree on its screens, data, and acceptance criteria before building.

Set boundaries

Decide which secondary features, integrations, and platform support can wait. Your version does not need to reproduce everything in the original.

Check the hard parts

Validate external services, specialist technology, data access, and ongoing costs for your chosen scope.

SUGGESTED BUILD STACK
React Native
Expo
Zustand
react-navigation
expo-image-picker
react-native-reanimated
BUILD KIT DIFFICULTY
Advanced

From the Build Kit assessment.

A reliable timeline needs an agreed scope and a technical check. Ask your agent to estimate the phases in BUILD_PLAN.md after that review.